Furnace stoker



FURNACE STOKER Filed o'cn. 4, 1920 2 sheets-sheet 1 Apr. 3, 1923. 11,45%51.

H. D. GROSS l FURNACE STOKER Filed OGL. 4, 1920 2 sheets-sheet 2 Patented Apr. v3, 1923.

nii iii' HENRY D. GROSS, OF KENNETH?, MISSOURI.

rumanos s'roxnn.

Application filed October 4, 1920. Serial No. 414,565.

of Missouri, have invented certain new and useful Improvements in Furnace Stokers; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The object is to provide a simple and etlicient stoking apparatus for use in connection with furnaces, wherebyl cotton seed hulls, shaving-s from planing machines, saw dust and the like, powdered or granular forms of fuel of a relatively light character may be economically fed to furnaces as a substitute for the forms of fuel now in common use, to the end that these otherwise waste materials may be utilized to advantage to effect an economy in the use of standard forms of fuels and avoid the necessity of separately destroying such waste materials at an additional expense; and with these objects in view, the invention consists in a construction and combination of parts of which a preferred embodiment is shown in the accompanying` drawings, wherein Figure 1 is a side view of a stoking apparatus embodying the invention applied in the operative position to a furnace,

Figure 2 is a plan view of the same,

Figure 3 is a longitudinal sectional view thereof showing in dotted lines the adjusted or choking position of the trap,

Figure 4 is an end view looking at the discharge or furnace end of the chute to show the construction of the yielding damper,

Figure 5 is a detail longitudinal section of the discharge end of the chute showing in full and dotted lines different adjusted positions of the damper which can be regnlat ed to suit the furnace draft and the freedom with which the fuel material flows through the chute.

The stoker consists essentially of a chute 10 of which the receiving end is adapted to be arranged under the discharge spout of a conveyor or blower by which the cotton seed hulls or other material is deposited, the oppositie or discharge end of the chute being extended through an opening 11 in the furnace wall 12 so as to discharge into the fire box or combustion chamber of the furnace,

a cap 12 being extended over the portion of the chute which extends through the wall so as to support the masonry or brick work spanning' the same.

Immediately outside of the plane of the furnace wall there is arranged a slide or gate 14 by which the passage through the chute may be regulated and by which it may be completely cut off when the stoker is not in use. rlhe side edges of the slide or gate, in the construction illustrated are fitted in `guides 15 on the side walls of the chute.

Extending downwardly and forwardly from the plane of the slide or gate and toward the discharge end of the chute, .is a yielding damper 16, pivotally mounted as at 17 and adapted to bear at its free end upon the bottom of the chute, the cotton hulls or other fuel such as shavings, sawdust and the like being adapted to pass under the edge of said damper subject to the action of gravity tending to feed the fuel toward the furnace and the internal draft of the furnace which tends to suck or draw the fuel into the lire box or combustion chamber. The sensitiveness of the damper to the grarital action of the fuel and the suction in the lire box may be regulated by varying' the length of the damper, to which end the latter is provided with an adjustable extension 18 slotted as at 19 and engaged by a bolt 20 or similar fastening means, it being obvious that when the damper is extended, itr will ride more easily upon the material flowing beneath the same and will tend to feed the material more freely, whereas when reduced. in length by the rearward adjustment. of the extension member, it will occupy a more nearly vertical position and will yield less readily both to the action of gravity on the fuel and the draft within the furnace.

At the receiving or inlet end of the chute there is arranged a tilting trap 21 fulcrumed Vas at 22 and adapted to be reversely tilted to direct the fuel such as cotton hulls, shavings, saw-dust and the like in the opposite direction for discharge upon the ground or into a suitable receptacle, when the rapidity with which the fuel material is fed to the chute is greater than should be supplied to the furnace. In other words, if the fuel is being deposited in the trap more rapidly than it should be fed to the furnace, the trap may be tilted in the opposite direction at intervals to diverge certain portions or a certain percentage of the material while the balance is permitted to lind its way along the chute to be fed under the damper to the lire box or combustion fehainber. The tilt-- ing trap constitutes a convenient means whereby. the operator may regulate the rapidity With which the 'fuel is ted along the chute.

It will be understood that the above device constitutes a ineans whereby an ordinarily waste product which under the present practice is usually destroyed and the destruction out which involves an additional expense in ronnect-ion with the business in which the material is a Waste product. By providing tor utilizingsuch material as the 'uel for a boiler furnace or the like. other 'forms of fuel may be saved or used 4in smaller quantities7 and by regulating the rapidity with which this waste material is supplied as a fuel to the furnace, the dratt arrangements ot the lattei'1 may be readily controlled and a unitorin heat maintained without the constant attention oit' a fireman as required in the use of the ordinary 'torni's ot fuel.

What I claiin is A furnace stoking` apparatus coinprising` a chute adapted to have its discharge end in communication' With a furnace fire box,

a yielding 'feed regulating" drunper disposed in a forwardly and downwardly inclined 'relation to the path ot travel of the 'fuel and pi votally mounted in a plane above the bottoni ot the chute, an adjust-able extension ca ried by said damper whereby the angle of inclination of the dani per may be varied and thereby vary the retarding' action et the damper, a second damper arranged to intercept and regulate the passage ot fuel to the inclined damper, the receivingv end ot chute having` its bottoni cut away, a reversible 'trau pivoted to the side walls ot the chute adjacent the cut. away portion and adapted to be moved into a position at an angle to the chute to prevent Yfuel beingdeposited in the chute when the trap is in one position and thereby prevent overstolc ing et the turn-ace, and said trap adapted to i'orin a part of and an extension for the chute when the trap is in its norinal position.

ln testimony whereof atlix niy signature in presence ot two Witnesses.

l HENRY D. @RUSH l/Vitnesses I. Lr SMITH, J. C. C. HISHER. 

